Pulley



(No Model.)

J. HIXENBAUGH.

PULLEY.

No. 400,213. Patented Mar. 26, 1889.

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JOIIN l-IIXENBAUGH, OF SMITHTON, PENNSYLVANIA.

PULLEY.

SPECIFICATION forming part of Letters Patent No. 400,213, dated March 26, 1889.

Serial No. 279,706. (No model.)

To all whom it may concern:

Be it known that I, JOHN I'IIXENBAUGH, a citizen of the United States, residing at Smithton, in thecounty of \Vestmoreland and State of Pennsylvania, have invented a new and useful Improvement in Belt Wheels or Pulleys, of which the following is a specification.

My invention relates to improvements in belt wheels or pulleys; and it consists in a pulley having pockets opening into its rim or face and extending radially toward the center of the wheel, each of said pockets being pro vided with means of adjusting and holding blocks of elastic or fibrous material, which extend to or slightly beyond the face or rim of the pulley.

The objects of my invention are to prevent slipping of the belt when running over the pulley; also to prevent the belt from running off the pulley when in operation; also to some extent to provide means of tightening the belt.

In the accompanying drawings, Figure 1 is a side view of my improved pulley. Fig. 2 is a section of the same on line x as.

Like figures refer to like parts throughout.

My improved pulley or belt-wheel is constructed in the following manner: It is cast in the well-known way with its hub, spokes, and rim, the rim 1 having rectangular pockets or boxes 2 equidistant from each other. The pockets 2 have rectangular openings 7 in the rim, the shortest side of which is parallel to the edge of rim 1. After the pulley has been cast, the bottom 9 and side 8 of pocket 2 are drilled and tapped for the reception of setscrews 5 and 6, which are provided with jamnuts 5 6. In the bottom of each pocket is placed a rectangular metal plate, 3, which is of such size as to move freely in pocket 2 from its bottom to its mouth, and against which bear the set-screws 5 5. The metal plate 3 having been placed in pocket 2, there is inserted a block of elastic or fibrous material, 4, of rectangular sectionof such size as to fit snugly in pocket 2, and that when one end rests upon plate 3 the other will be flush with or will extend slightly beyond face of rim 1. The structure and composition block 4 is preferably such as to be slightly elastic, so as to give to some extent to a belt running over the pulley, and also to afford as great opportunity as possible for friction between the belt and block +1, the composition and structure of both being taken into consideration. The block may be made of rubber, leather, wood, or other suitable material. The pocket 2, opening 7, and block 4 are made in rectangular shape, because I believe it to be of material advantage to so construct them, for the reason that when so constructed a greater surface to produce friction between the belt and block 4: is afforded with the least possible unevenness on the rim or face of the pulley. The pocket, opening, and block might be made in other shape, but not I think to so great advantage. The plate 3 may be dispensed with where there is but little strain upon the belt,

the object of it being to afford a surface for set-screws 5 5 to bear against and prevent their boring into block 4; but where there is considerable pull upon the belt it is necessary for the reasons above stated.

In use, the pulley having been placed upon its shaft, the blocks at are brought flush with the face of rim 1 by means of set-screws 5 and 6, screws 5 allowing it to enter pocket 2, and screws 6 holding it in place with relation to face of rim 1. The belt being on the pulley, the blocks 4, that touch it with the pulley at rest, are brought firmly in contact by screwing screws 5, which, having been adjusted to the point desired, are fixed in their places by jamnuts 5. The block at, having been forced beyond the face of rim 1 the, proper distance, is held there by operation of set-screws (3, which are in turn fixed by j am-nuts 6. Those blocks 4 in contact with the belt with the pulley at rest having been adjusted, the pulley is revolved and other blocks 1 brought into contact with the belt and adjusted with relation thereto, and this operation is to be repeated until all the blocks 1 in the pulley are adjusted.

I claim the following advantages for inyimproved pulley-via, that by the insertion of blocks of frictional material in the rim of the pulley a greatly-increased grip or pull is given ICO wish to be limited to thatnuinber, tor the reason that in practice a \ery1iarrow-rilnmed pulley may require but a si 11 gle screw in eacl1 its bottom and side while a Wide-rinnned pulley may require many times that number.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. A belt wheel or pulley having" a rim perforated with rectangular holes equidistant from each other therein, the short sidcol' said holes being parallel with the edge of said r1111, said rim having a pocket extending radially from each of said holes, each oi. said pockets having two sets of set-screws, one set fixed in the side, the other the bottom of said pocket, and each having fixed therein an adj ustable plate and block, substantially and :l'or the purposes described.

2. A belt wheel or pulley having the rim 1, in which are holes 7, provided with pockets 2, which have set-serews 5 and (3, being in bottom E) and side 8 thereof, and being provided 5 with their jam-nuts 5 ti',respeetively, and in which are adj us1 able plate 3 and adjustable block substantially as and for the )ur ioses deseril )ed.

3. A bz'tnd-pulley )rovided. with frictional. blocks of elastic or fibrous material arranged at intervals around. the periphery of the pulley and extending slightly beyond its face or rini, all substantially as described.

4-. A band-pulley provided with frictional blocks of elastic material, arranged at intervals around its periphery and extending slig'htly beyond its face or rim, and devices for adjusting the blocks to the face of the pulley, all substantially described.

5. A band-pulley provided with pockets opening into its rim or face, and arranged at intervals around. its periphery, and blocks of elastic or fibrous material arranged in said. pockets and extending slightly beyond its face or rim, all substantially as described.

In witness whereof I have hereunto set my hand this 5th day of July, A. 'l'). 1988.

JOHN lllXlCNBAUGll.

Witnesses:

ALEX. RANKIN, mono r: W1 Ll JLAMSt )N. 

